Rear Window

I have a 1984 Blazer, the rear window motor is nto working, I have for some strange reason a manual window crank, will the manual crank match up to anything from the electric side or should I just break down and buy the new motor?????

Welcome to the site.
If I remember, the regulator is different, so the manual crank won't attach.

Tear open the panel and try cleaning the motor contacts, clean and relube the moving parts, and retry the motor. Also, if I recall, there is a door contact around the tailgate that, if not lined up right, won't send power to the motor.